| abstract |
Singlelayer and multilayer polyolefin foam pipes with improved compression resistance have a polyolefin foam layer which consists of mixtures of modified propylene polymers having strain hardening behaviour of propylene homopolymers with a stereospecifity index > 98 % or propylene copolymers with a stereospecifity index of the homopolymer matrix of > 96 %. The polyolefin foam pipes are coated steel pipes for transporting crude oil or gas products or district heating applications, singlelayer pipes for insulation purposes and for non- or low-pressure applications and multilayer plastic pipes for the transportation of hot or cold fluids. |